Paper cutter



June 1, 1943. M, c. KABlGTlNG PAPER CUTTER Filed Oct. 6, 1941 INVENTOR MARCELO C. KABIGTING BY W M, wwkm ATTORNEYS Patented June 1, 1943 PAPER CUTTER Marcelo C. Kabigting, Redwood City, Calif Application October 6, 1941, Serial No. 413,864

Claims.

The present invention relates to improvements in a paper cutter and it consists of the combinations, constructions and arrangements hereinafter described and claimed.

An object of my invention is to provide a paper cutter in which the cutting blade is protected so that it can cause no injury to the operator.

A further object of my invention is to provide a device of the type described in which the cutting blade cooperates with a runner for receiving and cutting material received between the runner and the blade. This prevents the blade from injuring or marring the surface over which the device is moved.

A further object of my invention is to provide a cutting blade which is swingable into various angular positions, and this causes the blade to perform a double function of bringing a new portion of its edge into position for cutting the material and of changing the angle of the cutting edge so that the tool can be adjusted to cut materials offering various kinds of resistance.

Where the material is more difiicult to cut, the

angle of the blade can be altered to form more of an acute angle with the plane of the material. v A further object of my invention is to provide a device of the type described which is simple in construction, durable and efiicient for the purpose intended, and in which the blade may be removed and a new one substituted, thus prolonging the life of the device indefinitely.

Other objects and advantages will appear in the following specification, and the novel features of the device will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawing forming a part of this application, in which:

Figure 1 is a vertical, longitudinal section through the device taken along the line 1-1 of Figure 2;

Figure 2 is a front elevation of the device; and

Figure 3 is a top plan view of the device.

While I have shown only the preferred form of my invention, it should be understood that various changes or modifications may be made within the scope of the appended claims without departing from the spirit of the invention.

In carrying out my invention I provide a casing or housing A which has a hollow interior for receiving a material cutting blade indicated generally at B. The top of the housing A is preferably flat as indicated at I and has a central longitudinally extending slot 2 for receiving the three figures.

upper portion of the blade B. Large openings 3 are formed in the top and are disposed adjacent to the slot for permitting the operator to view both sides of the, blade and thus determine the cutting action thereof. The frontedge of the top is rounded as at 4.

The casing or housing has downwardly extending'sides 5 and 6 whose lower edges constitute runners I and 8, see Figure 2. The housing carries an integral guide 9 at its front and the rear of the housing has an integral handle I0 for moving the device. The handle extends rearwardly and upwardly from a downwardly depending central portion I I that is disposed at the back of the housing and this portion carries an integral central runner I2 thatprojects forwardly. The runner extends a slight distance in front of the guide 9 and housing A and the front. portion of the central runner is tapered as. illustrated in the This adapts the central runner to be inserted under the material to be cut.

The blade B is substantially triangular in shape and has a recess I3 that is rockably mounted on a pin I4. The pin in turnis carried by the central depending member II and extends transversely of the plane of the blade. The member II and a central runner I2 have cooperating grooves I5 and I6 respectively that are aligned with each other and are designed to receive the blade B. The pin extends across the juncture of the two aligned grooves. The blade may be rocked. into various angular positions about the pin I4 as a pivot and is held in adjusted position by a means now to be described.

A double rack member IT with angularly inclined arms I'Ia and I'll; is mounted on the blade and has two sets of rack teeth I8 and Ill. The teeth I8 cooperate with an adjustable pawl 20 while the teeth I9 cooperate with an adjustable pawl 2|. Both pawls 20 and 2| are slidably mounted on the top I of the housing A and are 'frictionally held in position by clips 22 and 23.

When adjusting the blade B into the desired angular position, the two pawls 20 and 2I are moved away from each other and then the blade is swung into the position desired, whereupon the two pawls are moved toward each other and will engage with the rack teeth I8 and I9 to hold the blade against accidental movement. In this simple way the angle of the blade may be adjusted and new portions of the blade may be brought into cutting positions.

From the foregoing description of the various parts of the device, the operation thereof may be readily understood.

In using the device, the material to be cut is passed over the central runner [2. The sides 5 and 6 have cam shaped front edges 5a and 6a for guiding the material under the side runners l and 8. The movement of the device over the material will cause the central runner I2 to lead the material against the cutting edge 24 of the blade B and this edge will cut the material. The device can be moved over a surface 25 during its cutting operation without causing any harm thereto because the blade is spaced from the surface by the central runner l2. The guide 9 indicates the position of the blade and if the material is marked, the guide may be moved along the marking which will cause the blade to sever the material accurately along. the line of marking. It is possible to manipulate the device for cutting curves or straight portions.

The device is especially adapted to cut clippings from magazines, newspapers, etc., where the operator does not wish to mar the page adjacent to the one being cut. The side runners 1 and 8 will move over the uncut supporting page while the central runner l2, will lift the page to be cut and guide it toward the cutting edge of the blade. A new blade can be substituted for the used one and the change can be effected quickly by merely separating the pawls 20 and 2| from the racks l8 and I9, then removing the blade through the slot 2 and finally substituting a new blade for the used one. The teeth i8 and I9. permit the blade to be held in different angular positions to vary the cutting efficiency of the device and for bringing difierent portions of the blade into cutting position. The life of the blade is thus increased and the efficiency of the tool enhanced.

The groove l6 has a slot 26 underlying the cutting edge 24 of the blade. B. The slot will permit any finematerial severed by the. blade to pass through the slot. In this way the groove l6 will not become filled with cuttings and the device will be self-cleaning.

I claim:

1. A paper cutter comprising a housing movable over the material to be cut, a runner carried by the housing and being movable under the material, a material-cutting blade having its cutting edge inclined with respect to the runher for cutting material passing between the runner and the blade, said housing practically hiding the blade from view, and a pointer disposed at the front of the housing and in line with the blade for indicating the line of cutting. said housing having openings therein for permitting the cutting blade to be viewed.

2. A paper cutter comprising a housing having a top and side walls, the lower edges of the side walls constituting runners and adapted to slide over the material to be cut, a central runner designed topass under the material and having a slot in its upper surface, said central runner being integral with the housing, a cutting blade carried by the housing and protected thereby, said blade having a portion extending down into the slot, and a pointer integral with the housing and being aligned with the blade for indicating the line of cutting.

3. In a paper cutter, a housing, a blade carrier removably secured to the housing, a blade removably secured to the carrier and protected by the housing, a member carried by the housing and adapted to pass under the material to be cut, said blade having its cutting edge inclined with respect to the member for cutting the material as the housing is moved thereover, and a pointer integral with the housing and aligned with the plane of the blade for indicating the line of cutting.

4. In combination, a housing having a slotted member adapted to move under a piece of material to be cut, a knife mounted within the housing and pivoted adjacent to the member, the top of the housing having a slot for receiving the upper portion of the knife, and adjustable means mounted on top of the housing for holding the blade at the desired, angle, said means comprising a rack carried by the blade, and pawls, engageable with the rack for supporting the blade at the desired angle.

5. In combination, a housing having a member adapted to move under apiece. of material tobe cut, a knife mounted within the housing and pivoted adjacent to the member, a double-rack secured to the knife at a point remote from the pivot point of the knife, and pawls carried by the housing and engageable with the double-rack for holding the knife in different angular positions.

MARCELO C. KABIGTING. 

